By Francisco J. Goin, Michael O. Woodburne, Ana Natalia Zimicz, Gabriel M. Martin, Laura Chornogubsky
This e-book summarizes significant features of the evolution of South American metatherians, together with their epistemologic, phylogenetic, biogeographic, faunal, tectonic, paleoclimatic, and metabolic contexts. a short evaluation of the evolution of every significant South American lineage ("Ameridelphia", Sparassodonta, Didelphimorphia, Paucituberculata, Microbiotheria, and Polydolopimorphia) is equipped. it truly is argued that as a result of physiological constraints, metatherian evolution heavily the stipulations imposed through international temperatures. regularly phrases, in the course of the Paleocene and the early Eocene a number of radiations of metatherian lineages happened, with many adaptive forms exploiting insectivorous, frugivorous, and omnivorous adaptive zones. In flip, a mix of generalized and really good forms, the latter typically exploiting carnivorous and granivorous-folivorous adaptive zones, characterised the second one half the Cenozoic. In either classes, weather used to be the severe motive force in their radiation and turnovers.
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Extra info for A Brief History of South American Metatherians: Evolutionary Contexts and Intercontinental Dispersals
Simpson was also active in the description, allocation, and phylogenetic speculation of several major lineages of South American metatherians, most notably polydolopid polydolopimorphians and didelphoid didelphimorphians (for the latter see Goin 1991). Also relevant as major frameworks on mammalian evolution in South America, stand the contributions by Patterson and Pascual (1968, 1972). This period also saw major improvements in the design of a biochronological scheme for the continental Cenozoic of South America.
Rev Arg Hist Nat 1:259–290 Ameghino F (1891c) Sobre la supuesta presencia de creodontes en el Mioceno Superior de Monte Hermoso. Rev Arg Hist Nat 1:437 Ameghino F (1893a) Les mammifères fossiles de La Patagonie Australe. Rev Sci 51:13–17 Ameghino F (1893b) New discoveries of a fosil Mammalia of Southern Patagonia. Amer Nat 27:445 Ameghino F (1893c) Les premieres mammiferes. Relation entre les mammiféres diprotodontes eocenes de l´Amerique du Nord et deux de la Republique Argentine. Rev Gen Sci Pures et Appliq 4(3):77 Ameghino F (1898) Sinopsis geológico-paleontológica de la República Argentina.
The earliest record of a thylacosmilid sparassodont is that of an isolated upper molar recovered from early Miocene levels of Colhuehuapian age at Gran Barranca, in southern Chubut Province, Patagonia (Goin et al. 2007). Even though it comes from levels at least ﬁve million years older than those of La Venta, it already shows morphological specializations as advanced, or even more so, than those of the tropical, middle Miocene Anachlysictis gracilis—comparisons have to be made on indirect grounds, as the latter was based on a lower jaw.
A Brief History of South American Metatherians: Evolutionary Contexts and Intercontinental Dispersals by Francisco J. Goin, Michael O. Woodburne, Ana Natalia Zimicz, Gabriel M. Martin, Laura Chornogubsky